Previously, the A1 e-tron was Audi's smallest e-tron model--but another looks to be on the way.

Inside EVs reports Audi is considering a model based on the recently-launched Volkswagen e-Up--an electric version of the minicar sold in Europe.

It could actually be more powerful and offer more range too--while the regular e-Up gets 93 miles of range, Audi is said to be aiming for 124 miles with its own variant. With 116 horsepower, it will even offer sub-10 second 0-62 mph times.

Unfortunately it's unlikely such a thing will reach the U.S, since the Up hasn't been "federalized" to meet U.S. safety standards.

The battery electric subcompact uses a fist-sized Wankel rotary engine under the rear deck to generate electricity that powers the electric motor driving the front wheels, once the battery pack has been depleted.

The Audi A2 Concept was unveiled in 2011 at the Frankfurt Motor Show, and it's the only dedicated body and chassis among all the e-trons. The rest are derived--though in some cases with quite major adaptations--from production gasoline cars.

The A2, intended to be a direct competitor for the all-electric BMW i3 (which offers an optional range extender as well), is not as adventurous a design as the i3, which has a carbon-fiber reinforced plastic body atop an aluminum platform with the battery pack in the floorpan.

Like the A1 e-tron though, the all-electric A2 may be put on ice. In fact, we've heard very little about the Audi A2 at all since Frankfurt 2011--if the company is working on something, it isn't giving much away.